A　DC　microgrid　composed　of　photovoltaic　(PV)　units,　LiFePO4　battery/supercapacitor　(SC)　hybrid　energy　storage　systems　(HESSs)　and　loads　has　become　an　essential　part　of　new　energy　generation　(NEG).　This　paper　proposes　a　coordinated　control　strategy　for　the　DC　microgrid,　which　is　accomplished　by　utilizing　the　LiFePO4　battery/SC　HESS　as　the　master　unit　and　the　PV/gas　turbine　(GT)　as　the　slave　units.　The　HESS　coordinates　PV　and　GT　by　employing　state　of　charge　(SOC)　to　prevent　the　system　from　overcharging　or　over-discharging.　Specifically,　this　paper　presents　an　adaptive　SOC-based　droop　control　strategy　for　HESS　to　adjust　the　bus　voltage　and　charging　and　discharging　rates.　The　designed　droop　factors　change　adaptively　based　on　the　SOC.　Then　a　coordinated　operation　scheme　is　developed　for　the　DC　microgrid　based　on　the　state　of　DC　bus　voltage　and　the　setting　of　upper　and　lower　limits　of　SOC　for　HESS,　where　the　PV　unit　switches　between　the　maximum　power　point　tracking　(MPPT)　control　pattern　and　the　constant　voltage　control　(CVC)　one.　Also,　the　small-signal　stability　analysis　is　conducted　for　HESS.　Simulation　tests　validate　the　effectiveness　of　the　presented　strategy.　©　2022　IEEE.